5001868721 has 2 divisors, whose sum is σ = 5001868722. Its totient is φ = 5001868720.

The previous prime is 5001868657. The next prime is 5001868787. The reversal of 5001868721 is 1278681005.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2684794225 + 2317074496 = 51815^2 + 48136^2 .

It is a cyclic number.

It is not a de Polignac number, because 5001868721 - 2⁶ = 5001868657 is a prime.

It is not a weakly prime, because it can be changed into another prime (5001868621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2500934360 + 2500934361.

It is an arithmetic number, because the mean of its divisors is an integer number (2500934361).

Almost surely, 2^5001868721 is an apocalyptic number.

It is an amenable number.

5001868721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5001868721 is an equidigital number, since it uses as much as digits as its factorization.

5001868721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 38.

The square root of 5001868721 is about 70723.8907371477. The cubic root of 5001868721 is about 1710.1889513399.

The spelling of 5001868721 in words is "five billion, one million, eight hundred sixty-eight thousand, seven hundred twenty-one".